[mythtv] New MythMusic bugs

[Thomas Börkel]

HI!

These bugs have not been in 0.16, so they are new in 0.17 or 0.18.

I have always had "Ignore ID3 tags" on. Now this happens for NEW songs 
in the database, that are being added by 0.18:

1.
MythMusic does not display the track length during playing, only the 
current position.

2.
MythMusic displays the ".ogg" suffix for OGG files (not happening for 
MP3 files).

I have already tried wiping the metadata to no avail.

Thomas